D. Montes

Departamento de Astrofísica, UCM

2001, ASP Conf. Ser., 223, CD-1471, The 11th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun , (Challenges for the New Millennium), (October 4th - 8th, 1999, Puerto de la Cruz, Tenerife, Spain),
R. García López, R. Rebolo, M.R. Zapatero Osorio (eds.),
PS_file

Stellar kinematic groups are kinematically coherent groups of stars that share a common origin. Since Olin Eggen introduced the concept of moving group and the idea that stars can maintain a kinematic signature over long periods of time, their existence has been rather controversial. However, recent studies using astrometric data taken from Hipparcos not only confirm the existence of classical young moving groups, but also detect finer structures in space velocity and age. Well known members to these moving groups are mainly early type stars and few studies have been centered in late-type stars. In our previous work (Montes et al. 1999a) we have compiled a sample of late-type stars of previously established members and possible new candidates to different young stellar kinematic groups (Local Association (20 - 150 Myr), Ursa Mayor group (300 Myr), Hyades supercluster (600 Myr), IC 2391 supercluster (35 Myr) and Castor Moving Group (200 Myr)). Here, new possible single late-type stars and chromospherically active binaries members (see the companion poster Montes et al. 1999b) have been added to the list. In order to better understand the origin of these young moving groups, and to be able to identify late-type stars members of the classical and the recently identified moving groups, we also need to study the kinematic properties of nearby young open clusters and star forming regions. With this aim we have taken the most recent data available in the literature (including astrometric data from Hipparcos Catalogue) of the nearby young open clusters (Robichon et al. 1999), OB associations (de Zeeuw et al. 1999), T associations, and other associations of young stars as TW Hya (Webb et al. 1999). We use these data to calculate their Galactic space motions (U, V, W) and space coordinates (X, Y, Z) and study their possible association with the different young moving groups as well as with the young flattened and inclined Galactic structure known as the Gould Belt.

Stellar kinematic groups

Young Open Clusters (table, with U, V, W)

New associations of young stars

Star Forming Regions

• SFR with recently X-ray detected weak-line T Tauri stars
• Nearby OB associations (J. de Bruijne, SPECTER)

The Gould Belt

• The Gould Belt System and the Local Interstellar Medium (Poppel W., 1997, Fund. of Cosmic Physics, Volume 18, pp. 1-271)
• The Gould Belt (GAIA)
• Gould Belt animation (x-ray active stars, ROSAT All-Sky Catalog, by R. Wichmann)
• T Tauri stars and the Gould Belt near Lupus (Wichmann et al., 1997, A&A, 326, 211)

• "Gould's Belt Survey: Star Formation in the Solar Neighborhood" (A Spitzer legacy project, Lori Allen)
• JCMT Gould's Belt Legacy Survey (James Clerk Maxwell Telescope)
• APEX Southern Gould's Belt proposal (Atacama Pathfinder EXperiment, APEX)

Catalogue of Late-type Stars in Young Stellar Kinematic Groups

Publications about SKG by the Stellar Activity Group (UCM)

Actividad estelar Stellar kinematic groups